石灰施用量对腾冲烤烟生长·产量和质量的影响

目的]为寻找腾冲酸性植烟土壤最佳石灰施用量。方法]试验设置5个施石灰处理(CaO 0、750、1 500、2 250、3 000 kg/hm2),比较各处理的烤烟生长和产质量的表现。结果]随着石灰的施用量增加,烟株的团棵期、旺长期、现蕾期都有所推迟。节距则随石灰施用量的增加而减小。当石灰施用量在处理C(CaO 1 500 kg/hm2)范围内时,农艺性状及经济性状均得到改善;而当超过此量时,不利于农艺性状及经济性状的改善。石灰施用量与烟叶还原糖含量呈正相关。除对中部烟叶烟碱含量效应较大外,石灰施用的效应最大为上部烟叶的化成成分。结论]从烟叶的可用性和经济效益综合考虑,以CaO 1 500 kg/hm2为腾冲酸性土壤石灰施用最佳量。

Effects of Lime Application Rate on Growth,Yield and Quality of Flue-cured Tobacco in Tengchong

Objective] To select the best lime application rate for flue-cured tobacco.Method] Five lime application treatments with 0,750,1 500,2 250 and 3 000 kg/hm2 CaO were set up,the yield and quality of flue-cured tobacco under each treatment were compared.Result] With the increasing application amount of lime,the rosette stage,vigorous growing stage and bud emergence stage were delayed,the internodes length was reduced.Under the treatment C(1 500 kg/hm2 CaO),the lime application improved the agronomic characters and economic characters.While when the application amount CaO>1 500 kg/hm2,the agronomic characters and economic characters became worse.There was a positive correlation of lime application amount with reducing sugar of tobacco leaves.Apart from the large effect on the nitrogen content in middle leaves,the largest lime application effect was on the chemical components of upper leaves.Conclusion] In view of the tobacco availability and economic benefit,the best lime application rate was 1 500 kg/hm2 CaO.